Just put in a new oil fired boiler and moved the manifolds (what a job!) and put full flow ball valves on each line – boiler side and return side – so each line can be completely isolated. Some lines have only one rad, some have three. This fall will be the second winter and I want to do a much better job of balancing the system than this past year’s fussing.
I’m presuming a reasonable strategy would be to: open all valves at each rad, close the ball valve at the manifold half way, then start making adjustments at each rad to try to achieve equal temp. (Should I actually measure the surface temp at each rad?) If some rads don’t get hot enough, open ball valve; if some rads are always too hot, close ball valve more.
On a slightly different note, recirc pump is on the return side. Is it better to control the flow in any single line by adjusting the boiler-side or return-side ball valve?
And does anyone out there know of a book or source with all the best-practice answers on residential hot water recirculating systems?